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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Microscopic - make sure not sterile - very few bulls are actually tested






2. Help to signal hormone levels which we need both in the brain right next to each other.






3. 265-285 days






4. Animal which has been castrated after puberty






5. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






6. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






7. Milk ~305 days - dry 60 days prior to calving






8. What helps regulate spermatogenesis?






9. Sperm is produced here






10. 114 days






11. 114 days






12. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






13. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






14. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






15. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






16. (male) pushes the testes upward toward the body for warmth or protection






17. 1-3 days






18. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






19. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






20. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






21. Provide nourishment for the developing sperm






22. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






23. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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24. 24 hours before end of estrus cycle






25. Start of the reproductive tract for the female. located outside of the body






26. 26 hours after estrus begins






27. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






28. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






29. 2 month growth cycle. stored in the epididymis of the bull






30. Duct through penis that carries sperm and urine






31. 283 days






32. Front feet and head first. (except for hogs and dogs)






33. Days which have increasing daylight hours

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34. Parturition is controlled by...






35. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






36. 2 month growth cycle. stored in the epididymis of the bull






37. Not under a timeline - cow can not be sold as steak






38. Failure to have both testis (gonads) descend






39. Implies the amount of estrogen production






40. 1-2 days






41. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






42. The more stressed out the male is - the less sperm he is going to produce






43. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






44. Failure to have one testis (gonad) to descend






45. Birthing process (termination of gestation)






46. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






47. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






48. What about the sperm for a bull which has been castrated but still has testicles?






49. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






50. 16-20 hours